CVE-2022-3643: Medium severity linux kernel vulnerability
Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It appears to be an (unwritten?) assumption in the rest of the Linux network stack that packet protocol headers are all contained within the linear section of the SKB and some NICs behave badly if this is not the case. This has been reported to occur with Cisco (enic) and Broadcom NetXtrem II BCM5780 (bnx2x) though it may be an issue with other NICs/drivers as well. In case the frontend is sending requests with split headers, netback will forward those violating above mentioned assumption to the networking core, resulting in said misbehavior.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2022-3643?
CVE-2022-3643 is categorized as a medium severity vulnerability due to its potential to cause NIC interface reset or crash in affected systems.
How do I fix CVE-2022-3643?
To fix CVE-2022-3643, users should upgrade to one of the recommended Linux kernel versions: 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.11-1, or 6.12.12-1.
What systems are affected by CVE-2022-3643?
CVE-2022-3643 affects multiple versions of the Linux kernel ranging from 3.19 to 6.0.13.
Can CVE-2022-3643 be exploited remotely?
Yes, CVE-2022-3643 can be exploited by a guest in a virtualized environment by sending specific packets to the compromised NIC.
Is there a workaround for CVE-2022-3643?
Currently, the primary mitigation for CVE-2022-3643 is to apply the necessary kernel updates as no specific workaround has been recommended.